Fulton Vertical Electric (FT-N) Thermal Fluid (hot oil) Heater - Manual (Page 53)

Fulton Thermal Corp.*Electric Thermal Fluid Heaters Manual* Version 2010-0423
Page 53
10. Energizing the Elements
a) When the system is initially brought up to temperature, additional pipe scale and welding
slag will loosen and enter the fluid stream. This will be trapped in the strainer causing
vacuum at the pump suction. This procedure must be followed as necessary in the
course of heater operation.
b) Check safeties.
c) Place three position switch in Position “2”. Elements will begin to cycle on.
d) Check gauges indicating pump and circuit pressures. Make sure readings remain stable.
In case of pressure fluctuations, turn three position switch to Position “1”, elements will
cycle off but pump continues to circulate fluid. When pressures have stabilized, switch to
Position “2”.
e) Continue in this manner up to the maximum operating temperature. Throughout the initial
warm-up, the expansion tank and its overflow pipe must be watched to detect the
formation of froth, indicating the presence of water.
f) Water in the fluid can provide the ejection of a certain amount of fluid as soon as a
temperature of 212°F (100°C) is reached. If this occurs, a temperature of 212°F must not
be exceeded until frothing and fluid ejection have completely ceased.
Note
Flash steam may be generated at any point up to the operating temperature. Watch
for gauge fluctuations.
g) Continue bringing unit up to temperature slowly, with a temperature rise not exceeding
100°F (38°C) per hour. Do not exceed specified maximum outlet temperature. In the
absence of specific information, consult the factory before proceeding.
Pressure Gauges